Portable regulatable lamp



W. A. HARVEY PORTABLE REGULATABLIE LAMP Filed July 2. 1923 3Sheets-Sheet 1 Aug. 23,1927. 1 1 639,114

i Swucntoz llilliamdflarvg 1 w. A. HARVEY PORTABLE REGULATABLE LAMPFiled July 2; 1923 3 Sheets-Sheet 2 anvcwcoz MlliamAfiarz/g' atfazmmf w.A. HARVEY PORTABLE REGULATABLE LAMP Filed July 2, 192a s Sheets-Sheet 3u. Z {a Q snow Wop llilliamA/Yarvg Patented Aug. 23, 1927.

1,639,774 PATENT OFFICE.

WILLIAM A. HARVEY, or soa'AN'roN PENNSYLVANIA.

PORTABLE REGUL TABLE LAMP.

Application filed July '2, 1923." Serial No. 649,148.

My invention relates to electric light fixtures, and particularly tolight fixture con-l structions embodying. means for anchoring andpreventing. independent rotation be-' tween a socket rotatable forregulationand the housing designed to enclose the same.

i There is at the present time, in extensive commercial use, socketsprovided with a resistance unitregulatable'by the rotation of a: shellfor controlling the brilliance of the electric light adapted to bescrewedinto the socket. These sockets are constructed in accordance withthe structure shown in U. S. Patent No. 904,826, granted November 24,1908. 1

These sockets regulatable by rotation, as now commercially employed, areprovided,- as mentioned hereinbefore, with a shell portioir, to whichthere is usually attached a chain, the ends of which are passed throughdiametrically arranged guiding eyelets whereby the rotatable shell maybe adjusted by pulling either end of the chain.

- It has been found desirable to associatethis type of socket with lampstructures, and

to this end my invention consists inthe coir.

struction of the lamp which includes a hous- .ing for enclosing thesesockets. Inasmuch as these regulating sockets are customarily associatedwith the ordinary commercial type of standard socket, the regulatingsocket would in ordinary lamp structure's be projected upwardly beyondthe housingv of the lamp, thus rendering the appearance thereofunsightly. In my improved arrangement. a housing is provided which effectively conceals the regulating socket.

It has also been found that the constant rotation of the shell of theregulating socket causes the regulatingsocket to be unscrewed from thestandard socket with which it is associated, and my invention hastherefore as an object to provide means for effectively; anchoring theregulating socket Within the housing of a lamp sothat after theassembling of the lamp structure an unintentional disarrangement oftheparts is prevented. The various details of construction of my improvedinvention will be made more apparent as this description proceeds,especially when considered in V connection with the accompanyingdrawings, wherein;

Figure 1 is a longitudinal sectional view through a lamp structure, withcertain parts in elevation, showing one form of myimproved anchoringmeans;

Fig. 2 is a top plan view, partly in section,

of the structure illustrated in Fig. 1, with the electric light bulbremoved;

' Fig. 3 is a bottom plan view of the structure illustrated in Fig. 1;

Fig. 4 is a fragmentary sectional View, partly in elevation, showing amodified form of anchoring means;

ig. 5 is detail perspective view of the iorm of anchoring meansillustrated in Fig.

F ig. 6 is a View similar to Fig. 4, of an other modified form ofconstruction;

Fig; 7. is a detail perspective view of the form .of anchoring meansillustrated in Fig. 6;

F ig. 8 is a fragmentary sectional view of a portion of the lampstructure certain parts being shown in elevation, illustrating anotherform of anchoring means; I

Fig. 9 is a top plan View of the structure illustrated in Fig. 8, theelectric light bulb being removed; and, i

Fig. 10 is 'avertical sectional view, through another type ofv lightingfixture, showing another form of anchoring means.

Referring now particularly to Figs. 1 to 3,: the general arrangement ofthe structure and the first form of; anchoring means will be described.In the drawings the reference character 10 indicatesthe housing of aport'- able' electric lamp, having. an upwardly projecting extension 11and a hollow base 12. A; tubular member 13 extends upwardly through thehousing, and is threaded into the stande -rd socket 14-, which bearsagainst a restricted neck portion 15 of the housing, while the lower endof the tubular member 13 passespreferably through a plate" 16,arranged'within the hollow base 12, and has threaded onto its end a nut17, whereby the parts may be assembled and tied together.

attached, the ends of this chain passing" through guiding eyelets 20,formed on the ends of arms 21, projecting rigidly from the socket 18 atdiametrically opposed points. The eyelet 19 is secured to a shellportion of the socket, which is rotatable relatively to theremainder o'f'thesock'et, the rotation of this shell operating to cut in and out theresistance for varying the degree of brilliance of the light in the bulb22.

The extension 11, formed on the housing.

socket by clamping means 24, this handle and clamping meansbeingconstructed in accordance with my application, Serial No.

, 648,097, filed June 27, 1923. The shell of.

the socket 18 rotates relatively to the remainder of the structure, therotation being limited by the engagement of the eye 19 with either ofthe 'uiding eyes 20. It will be apparent that in adapting the socket foruse in connection with lamp structures of this character, I remove thecustomary operating chain and substitute therefor the operating handle23.

In this form of my invention, independent rotation between the socket 18and the socket 14, or the rest of the lamp structure, is prevented bythe provision of lugs 25, preferably cast integrally with the housing onthe inside thereof, these lugs being arranged diametrically opposite oneanother and being shaped to providea pair of spaced lips or tongues 26,forming a recess 27, suf ficient in width toreceive the arms 21 of theguiding eyelets 20, as clearly illustrated.

In assembling the device, the socket 18 is screwed into the standardsocket 14, which has previously been attached to the tubular member 13.Themember 13, with the attached sockets, is then passed downwardly into,the casing, and the plate 16 inserted over the end thereof, whereuponthe nut 17 may be threaded onto the end of'the tubular member 13. .Thetubular member 13 and sockets are so inserted that the arms 21 of theregulating socket 18 pass into operative engagement with the lugs 25,these arms being straddled by the lips 26 and reposing in the recesses27. Obviously, after the structure is tied together by means of the nut17, independent rotation of the socket with reference to the remainderof the structure, is prevented.

Referring now to Figs. 4 and 5, another form of my invention will bedescribed. In these figures it will be noted that a clamping ring 28,formed preferably of two complementary sections is provided, these ringsectionsbeing formed with angular cars 29, arranged in spaced parallelrelation, and perforated to receive a clamping bolt 30, whereby the ringmay be securely clamped around the standard socket 14.

Projecting upwardly from each of the ring sections is an arm 31, theupper end of which is bifurcated as at 32, forming a pair of'spaced ears33, adapted to engage both sides of the arms 21 of the guiding eyelets20. -Obvious, therefore, when the' parts are assembled in the mannerindicated 7' in Fig. 4, independent rotation of the regulating socket 18with reference to the standardsocket 14 is prevented, and inasmuchas thesocket 14 is securely mounted within the housing 10, a positive andrigid associa-.

tion of the complete structure is effected. I Referring now to Figs. 6and 7, another form of anchoring means will be described.

In this instance a substantially *U-shaped member 34 is provided, whichis apertured as at 35 to receive the tubular member 13 of the As thelamp structure it tied together in" the manner previously described, themem ber 34 will be rigidly positioned within the housing 10 and theupstanding arms there An annular boss 36 is pref- V of, which arebifurcated as indicated at 37, V

will come to engage the arms 21 of the regulating socket 18, so as toprevent the rotation of this socket member, as will be immediatelyapparent.

Referring now more particularly to'Figs.

8 and 9, still another form of my invention will be described. Foranchoring the regulating socket 18 in this instance there is provided aplurality, preferably two, bolts 38, I

threaded through the extension 11' of the lamp housing. adapted toextend through the eyelets 20 of The ends of these bolts are a theregulating socket, as clearly illustrated. Lock nuts 39, threadedontothe bolts 38, are, adapted to be forced against the. eyelets 2O 1 tosecurely lock the bolts in place and to'effectively anchor the parts.

Obviously, after the structure has been assembled and the regulatingsocket screwed home as far as it willgo, the necessary apertures maythen be formed in the housing, and the bolts 38 threaded therein. Beforethe bolts are permitted to pass into the eyelets 20, the locking nuts 39are threaded thereon, the bolts 38 being thereafter inserted through theeyelets 20 as illustrated, whereupon the lockingnuts may be tightened.Itwill be apparent that in this arrangement simple and effective meansare provided for anchor: ing the regulating socket within the housing.

. In Fig. 10, a form of portable electric lamp simulating a candle andcandle holder is illustrated. which simulates the candle, is of adiameter such as to frictionally engage the eyelets 20 with sufficientpressure to prevent a rotation of the socket 18. Thus,when the lampstructure is assembled, the sockets 19 with the eyelets 20 may be forceddownwardly into In this form, the housing 40,

the interior of'the housing 40, whereupon ture.

these parts thereafter preventing an independent rotation of theregulating socket with reference to the remainder of the structure.

From the foregoing it will be apparent to those skilled in thisparticular art that my invention contemplates generally the provision ofmeans for effectively and efficiently anchoring a socket regulatable byrotation to the remainder of the lamp structure, either by directlyconnecting the guiding eyelets or arms therefor to the housing, or byanchoring' these eyelet arms With means connected to another portion ofthe lamp struc- The several modifications herein described areindicative of its susceptibility to rearrangement and modification.

It should, therefore, be understood that my invention consists broadlyin the association with a portable lamp structure of anchoring meansassociated and interposed between the regulating socket and theremainder of the lamp structure for anchoring the regulating socket.

Having thus described my invention What I claim is:

a housing; a standard socket rigidly mounted in said housing; aregulatable socket having a member removably received in said standardsocket, and a regulating member oscillatably mounted thereon, said firstnamed member being provided with a projecting arm; and anchoring meansrigid with said housing and standard socket, en-

gaging said arm to prevent the unintentional disengagement of said firstnamed regulating socket member from said standard socket.

2. In an electric lamp, the combination of a housing; a standard'socketrigidly mounted in said housing; a regulatable socket having a memberremovably received in said standard socket, and a regulating memberoscillatably mounted thereon, said first named member'being providedwith a pair of projecting arms; and anchoring means comprising inwardlyprojecting members carried by said housing, engaging portions of saidarms for preventing the unintenti0na1 disengagement of said first namedregulating socket member from said standard socket.

In testimony whereof I affix my signature.

' WILLIAM A. HARVEY.

